Struct Assembly example

structasm.c

#include <stdio.h>

int main(void)
{
	struct myStruct
	{
		int id;
		char *name;
	};

	struct myStruct test;
	test.id = 4;
	test.name = "bacon";

	return 0;

}

##### gcc -S structasm.c  ######


       .section        __TEXT,__text,regular,pure_instructions
        .macosx_version_min 10, 11
        .globl  _main
        .align  4, 0x90
_main:                                  ## @main
        .cfi_startproc
## BB#0:
        pushq   %rbp
Ltmp0:
        .cfi_def_cfa_offset 16
Ltmp1:
        .cfi_offset %rbp, -16
        movq    %rsp, %rbp
Ltmp2:
        .cfi_def_cfa_register %rbp
        xorl    %eax, %eax
        leaq    L_.str(%rip), %rcx
        movl    $0, -4(%rbp)
        movl    $4, -24(%rbp)
        movq    %rcx, -16(%rbp)
        popq    %rbp
        retq
        .cfi_endproc

        .section        __TEXT,__cstring,cstring_literals
L_.str:                                 ## @.str
        .asciz  "bacon"


.subsections_via_symbols


### 32-bit using -m=32 ###

	.section	__TEXT,__text,regular,pure_instructions
	.macosx_version_min 10, 11
	.globl	_main
	.align	4, 0x90
_main:                                  ## @main
## BB#0:
	pushl	%ebp
	movl	%esp, %ebp
	subl	$16, %esp
	calll	L0$pb
L0$pb:
	popl	%eax
	xorl	%ecx, %ecx
	leal	L_.str-L0$pb(%eax), %eax
	movl	$0, -4(%ebp)
	movl	$4, -16(%ebp)
	movl	%eax, -12(%ebp)
	movl	%ecx, %eax
	addl	$16, %esp
	popl	%ebp
	retl

	.section	__TEXT,__cstring,cstring_literals
L_.str:                                 ## @.str
	.asciz	"bacon"